/* =====================================================================
   文 — GitHub Page · 古籍雕版版心式
   版心、鱼尾、四周双栏、朱丝栏、朱文印、旧纸纹理
   ===================================================================== */

/* ---------- 0. 字体 ---------- */
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+Mono:wght@400;500&display=block");

@font-face {
  font-family: "Fantasque WenKai";
  src: url("fonts/FantasqueWenKaiMono-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: block;
}
@font-face {
  font-family: "Fantasque WenKai";
  src: url("fonts/FantasqueWenKaiMono-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: block;
}

/* ---------- 1. 色板与尺度 ---------- */
:root {
  /* 旧纸 */
  --paper:        #f1e6cc;
  --paper-warm:   #f5ecd6;
  --paper-deep:   #e4d3ad;
  --paper-shade:  #d8c596;
  --paper-edge:   #c9b388;

  /* 墨 */
  --ink:          #1b1510;
  --ink-soft:     #4a3a28;
  --ink-faint:    #6e5a40;

  /* 朱 */
  --cinnabar:     #9c2a1c;
  --cinnabar-deep:#7c2014;
  --vermilion:    #b23a2a;
  --thread:       rgba(150, 55, 40, .16);
  --thread-soft:  rgba(150, 55, 40, .09);

  /* 栏线 */
  --rule:         #5e4a2a;
  --rule-soft:    rgba(94, 74, 42, .35);
  --gold:         #9a7327;

  /* 字体栈 */
  --f-song:    "Fantasque WenKai", "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  --f-accent:  "Fantasque WenKai", "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  --f-mono:    "Fantasque WenKai", "Noto Sans Mono", ui-monospace, "SFMono-Regular", monospace;

  /* 尺度 */
  --leaf-max: 1080px;
  --rule-gap: 7px;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--f-song);
  color: var(--ink);
  background-color: var(--paper-deep);
  /* 整页底层：旧纸渐变 + 噪点，营造书册裱褙之感 */
  background-image:
    radial-gradient(ellipse 120% 80% at 50% 0%, var(--paper-warm), transparent 60%),
    radial-gradient(ellipse 100% 60% at 50% 100%, var(--paper-deep), transparent 65%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
  background-attachment: fixed;
  line-height: 1.9;
  font-weight: 400;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 全局纸张噪点叠层 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
  opacity: .38;
}

::selection { background: rgba(156, 42, 28, .22); color: var(--ink); }

a { color: var(--cinnabar); text-decoration: none; }

/* ---------- 3. 书叶 .leaf：四周双栏 ---------- */
.leaf {
  position: relative;
  z-index: 2;
  background-color: var(--paper-warm);
  background-image:
    radial-gradient(ellipse at 30% 20%, rgba(255, 250, 235, .5), transparent 55%),
    radial-gradient(ellipse at 75% 80%, rgba(120, 88, 40, .10), transparent 60%);
  /* 四周双栏：外粗内细两道墨栏 + 第三道淡界 */
  border: 2.5px solid var(--ink);
  box-shadow:
    inset 0 0 0 var(--rule-gap) var(--paper-warm),
    inset 0 0 0 calc(var(--rule-gap) + 1px) var(--rule),
    inset 0 0 0 calc(var(--rule-gap) + 14px) var(--paper-warm),
    inset 0 0 0 calc(var(--rule-gap) + 15px) var(--rule-soft),
    inset 0 0 90px rgba(94, 64, 24, .16),
    0 30px 60px -28px rgba(60, 40, 10, .55),
    0 8px 22px -14px rgba(60, 40, 10, .4);
}

/* 四角书钉（古籍装订钉眼之意） */
.leaf::after {
  content: "";
  position: absolute;
  inset: 16px;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 0 0,    var(--ink) 0 2.5px, transparent 3px),
    radial-gradient(circle at 100% 0, var(--ink) 0 2.5px, transparent 3px),
    radial-gradient(circle at 0 100%, var(--ink) 0 2.5px, transparent 3px),
    radial-gradient(circle at 100% 100%, var(--ink) 0 2.5px, transparent 3px);
  opacity: .55;
}

/* 叶面晕影（vignette） */
.leaf::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(ellipse 95% 90% at 50% 48%, transparent 58%, rgba(110, 78, 30, .20) 100%);
}

/* ---------- 4. 版心 .banye ---------- */
.banye {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 26px 0;
  gap: 10px;
  background:
    linear-gradient(90deg, transparent 0, rgba(94, 74, 42, .22) 8%, rgba(94, 74, 42, .22) 92%, transparent 100%);
}
.banye::before, .banye::after {
  /* 版心左右两道竖线（书口折痕） */
  content: "";
  position: absolute;
  top: 14px;
  bottom: 14px;
  width: 1.5px;
  background: linear-gradient(180deg, transparent, var(--rule) 12%, var(--rule) 88%, transparent);
}
.banye::before { left: 6px; }
.banye::after  { right: 6px; }

.yuwei {
  width: 46px;
  height: 20px;
  display: block;
}
.yuwei svg { width: 100%; height: 100%; display: block; }

.banye-xiang {
  width: 1.5px;
  flex: 1 1 auto;
  min-height: 20px;
  background: linear-gradient(180deg, var(--rule), var(--rule-soft));
  opacity: .7;
}

.banye-title {
  font-family: var(--f-song);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: .12em;
  color: var(--ink);
  writing-mode: vertical-rl;
}
.banye-juan {
  font-family: var(--f-accent);
  font-size: .82rem;
  color: var(--ink-soft);
  writing-mode: vertical-rl;
  letter-spacing: .14em;
}
.banye-ye {
  font-family: var(--f-song);
  font-weight: 600;
  font-size: .95rem;
  color: var(--cinnabar);
}

/* ---------- 5. 首屏卷首叶 ---------- */
.frontispiece {
  max-width: var(--leaf-max);
  margin: 44px auto 30px;
  min-height: min(82vh, 820px);
  padding: 0;
}
.frontispiece .leaf-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 68px 1fr;
  align-items: stretch;
  min-height: min(82vh, 820px);
  padding: 58px 50px;
}

.face {
  position: relative;
}
/* 竖排列阵：块级子项自右向左成列，DOM 在先者居右（贴版心） */
.face-left {
  display: block;
  writing-mode: vertical-rl;
  text-orientation: upright;
  padding-right: 30px;
  height: 100%;
}
.face-right {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  padding-left: 34px;
}

/* 竖排：从右至左成列 */
.vline {
  writing-mode: vertical-rl;
  text-orientation: upright;
  margin-left: 26px;
  color: var(--ink);
}

.vline-tagline {
  font-family: var(--f-accent);
  font-size: clamp(1.3rem, 2.6vw, 2rem);
  letter-spacing: .28em;
  color: var(--ink-soft);
}
.vline-note {
  font-family: var(--f-accent);
  font-size: .95rem;
  letter-spacing: .2em;
  color: var(--ink-faint);
  margin-left: 22px;
}

/* 题额巨字「文」 */
.vline-title {
  font-family: var(--f-accent);
  font-weight: 400;
  font-size: clamp(7rem, 20vw, 15rem);
  line-height: 1;
  letter-spacing: 0;
  margin-left: 14px;
  color: var(--ink);
  text-shadow:
    0 0 1px var(--ink),
    1px 1px 0 rgba(60, 40, 10, .25);
}

/* ---------- 6. 朱文印 ---------- */
.seal {
  position: relative;
  display: inline-block;
  line-height: 0;
}
.seal svg { display: block; }
.seal-main { width: clamp(86px, 11vw, 120px); transform: rotate(-4deg); }
.seal-sub  { width: clamp(54px, 7vw, 72px);  transform: rotate(5deg); margin-top: 18px; }

/* 印泥不均：叠一层半透明朱，略错位 */
.seal::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='s'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0.61  0 0 0 0 0.16  0 0 0 0 0.11  0 0 0 1 0'/%3E%3CfeComposite in2='SourceGraphic' operator='in'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23s)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
  opacity: .4;
  border-radius: 8%;
}

.scroll-cue {
  margin-top: auto;
  padding-top: 18px;
  font-family: var(--f-accent);
  font-size: 1.05rem;
  letter-spacing: .3em;
  color: var(--cinnabar);
  align-self: flex-start;
  border-top: 1px solid var(--rule-soft);
  width: 100%;
}
.scroll-cue::before { content: "❖ "; opacity: .6; }

/* ---------- 7. 各卷 .codex ---------- */
.codex {
  position: relative;
  z-index: 2;
  max-width: var(--leaf-max);
  margin: 0 auto;
  padding: 10px 0 40px;
}

.juan {
  position: relative;
  background-color: var(--paper-warm);
  background-image:
    repeating-linear-gradient(90deg, transparent 0, transparent calc(100% - 1px), var(--thread-soft) 100%),
    radial-gradient(ellipse at 50% 0%, rgba(255, 250, 235, .5), transparent 60%);
  border: 2px solid var(--ink);
  box-shadow:
    inset 0 0 0 6px var(--paper-warm),
    inset 0 0 0 7px var(--rule-soft),
    inset 0 0 70px rgba(94, 64, 24, .12),
    0 22px 44px -26px rgba(60, 40, 10, .45);
  margin-bottom: 28px;
  padding: 46px clamp(28px, 5vw, 72px) 52px;
}

.juan-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule-soft);
}
.yuwei-mini { width: 30px; height: 14px; flex: none; opacity: .85; }
.yuwei-mini svg { width: 100%; height: 100%; display: block; }

.juan-head h2 {
  margin: 0;
  font-family: var(--f-accent);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: .14em;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 18px;
}
.juan-no {
  font-size: .62em;
  color: var(--cinnabar);
  letter-spacing: .2em;
  font-family: var(--f-song);
  font-weight: 600;
  border: 1px solid var(--cinnabar);
  padding: 2px 9px;
  border-radius: 2px;
}
.juan-name { letter-spacing: .35em; }

.juan-body {
  font-family: var(--f-song);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 2.05;
  color: var(--ink);
  max-width: 62ch;
}
.juan-body p { margin: 0 0 1.1em; }
.juan-body strong { font-weight: 600; color: var(--cinnabar-deep); }
.juan-body em {
  font-style: normal;
  font-family: var(--f-accent);
  color: var(--ink-soft);
}

/* 刻版命令块 */
.ke-ban {
  position: relative;
  margin: 22px 0;
  padding: 22px 26px;
  background: var(--paper);
  border: 1.5px solid var(--rule);
  box-shadow: inset 0 0 0 4px var(--paper), inset 0 0 0 5px var(--rule-soft);
  font-family: var(--f-mono);
  font-size: .96rem;
  line-height: 2;
  color: var(--ink);
  letter-spacing: .02em;
  overflow-x: auto;
}
.ke-ban::before {
  content: "命";
  position: absolute;
  top: -13px;
  left: 18px;
  background: var(--paper-warm);
  padding: 0 8px;
  font-family: var(--f-accent);
  font-size: .9rem;
  color: var(--cinnabar);
  letter-spacing: 0;
}
.ke-ban code { font-family: inherit; white-space: pre; }
.ke-ban .prompt { color: var(--cinnabar); user-select: none; }

.note-margin {
  display: block;
  margin: 10px 0 0;
  font-family: var(--f-accent);
  font-size: .96rem;
  color: var(--ink-faint);
  letter-spacing: .04em;
}
.note-margin::before { content: "注 ─ "; color: var(--cinnabar); opacity: .7; }

/* 引语 */
.quote-block {
  margin: 26px 0;
  padding: 20px 26px 20px 30px;
  border-left: 3px solid var(--cinnabar);
  background: rgba(156, 42, 28, .05);
  font-family: var(--f-accent);
  font-size: 1.18rem;
  line-height: 1.95;
  color: var(--cinnabar-deep);
  letter-spacing: .06em;
}

/* ---------- 8. 格目（token 表）---------- */
.mu-table-wrap { margin: 24px 0; overflow-x: auto; }
.mu-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--f-song);
  font-size: 1rem;
  background: var(--paper);
  border: 1.5px solid var(--rule);
}
.mu-table th, .mu-table td {
  padding: 13px 16px;
  text-align: left;
  border: 1px solid var(--thread);
}
.mu-table thead th {
  background: rgba(94, 74, 42, .12);
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--ink);
  border-bottom: 1.5px solid var(--rule);
}
.mu-table tbody tr:nth-child(even) { background: rgba(156, 42, 28, .035); }
.mu-table .hl {
  font-weight: 700;
  color: var(--cinnabar);
  background: rgba(156, 42, 28, .07);
}
.mu-table .num { font-family: var(--f-mono); font-size: .95rem; }
.mu-table code { font-family: var(--f-mono); font-size: .9rem; color: var(--ink-soft); }

.compare {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 24px 0;
}
.compare .cell {
  background: var(--paper);
  border: 1px solid var(--thread);
  padding: 16px 18px;
}
.compare .cell .lbl {
  font-family: var(--f-accent);
  color: var(--ink-soft);
  font-size: .95rem;
  letter-spacing: .06em;
}
.compare .cell .val {
  font-family: var(--f-mono);
  font-size: 1.05rem;
  margin-top: 4px;
  color: var(--ink);
}
.compare .cell.win { border-color: var(--cinnabar); background: rgba(156, 42, 28, .06); }
.compare .cell.win .val { color: var(--cinnabar); font-weight: 600; }

/* ---------- 9. 出处链接组 ---------- */
.source-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px dashed var(--rule-soft);
}
.source-list a {
  font-family: var(--f-song);
  font-size: 1rem;
  color: var(--cinnabar);
  border-bottom: 1px solid var(--thread);
  padding-bottom: 2px;
  transition: border-color .25s, color .25s;
}
.source-list a:hover { color: var(--cinnabar-deep); border-color: var(--cinnabar); }
.source-list a::before { content: "▸ "; opacity: .6; }

/* ---------- 10. 叶脚 / 刊记 ---------- */
.colophon {
  position: relative;
  z-index: 2;
  max-width: var(--leaf-max);
  margin: 0 auto 50px;
  padding: 30px clamp(28px, 5vw, 60px);
  background-color: var(--paper-deep);
  border: 1.5px solid var(--rule-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-family: var(--f-accent);
  color: var(--ink-soft);
  letter-spacing: .08em;
}
.colophon .kanji { font-size: 1rem; line-height: 1.9; }
.colophon .kanji span { color: var(--cinnabar); }
.colophon .ye-mark {
  font-family: var(--f-song);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--cinnabar);
}
.repo-link {
  font-family: var(--f-mono);
  font-size: .95rem;
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 7px 14px;
  border-radius: 2px;
  transition: all .25s;
}
.repo-link:hover { background: var(--ink); color: var(--paper-warm); }

/* ---------- 11. 动效 ---------- */
@keyframes ink-reveal {
  0%   { opacity: 0; filter: blur(10px); transform: translateY(14px); }
  60%  { opacity: 1; }
  100% { opacity: 1; filter: blur(0); transform: translateY(0); }
}
@keyframes glyph-drop {
  0%   { opacity: 0; transform: translateY(-26px) scale(.86); filter: blur(6px); }
  100% { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}
@keyframes seal-stamp {
  0%   { opacity: 0; transform: rotate(-12deg) scale(1.5); filter: blur(4px); }
  70%  { opacity: 1; transform: rotate(-4deg) scale(.95); }
  100% { opacity: 1; transform: rotate(-4deg) scale(1); filter: blur(0); }
}
@keyframes seal-stamp-sub {
  0%   { opacity: 0; transform: rotate(14deg) scale(1.5); }
  70%  { opacity: 1; transform: rotate(5.5deg) scale(.94); }
  100% { opacity: 1; transform: rotate(5deg) scale(1); }
}
@keyframes rule-draw {
  from { transform: scaleY(0); opacity: 0; }
  to   { transform: scaleY(1); opacity: 1; }
}
@keyframes char-rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 入场编排 */
.frontispiece { animation: ink-reveal 1.1s cubic-bezier(.2,.7,.2,1) both; }
.frontispiece .banye { animation: rule-draw 1s .35s ease-out both; transform-origin: top; }
.frontispiece .vline-title { animation: glyph-drop 1.2s .55s cubic-bezier(.2,.8,.2,1) both; }
.frontispiece .seal-main { animation: seal-stamp .9s 1.5s cubic-bezier(.2,.8,.2,1) both; }
.frontispiece .seal-sub  { animation: seal-stamp-sub .9s 1.75s cubic-bezier(.2,.8,.2,1) both; }

/* 竖排逐字浮出（JS 注入 .ch span） */
.vline .ch { display: inline-block; opacity: 0; animation: char-rise .6s ease-out both; }

/* 滚动揭示：默认可见（利于 SEO、阅读器、截图）；唯 JS 启用时方隐而待揭 */
.reveal { transition: opacity .8s ease-out, transform .8s cubic-bezier(.2,.7,.2,1); }
.js .reveal { opacity: 0; transform: translateY(28px); }
.reveal.is-in { opacity: 1; transform: translateY(0); }

/* ---------- 12. 响应式 ---------- */
@media (max-width: 760px) {
  .frontispiece .leaf-inner {
    grid-template-columns: 1fr 52px;
    grid-template-areas: "face banye";
    padding: 44px 24px;
  }
  .face-right { display: none; }
  .face-left  { padding-right: 18px; }
  .vline { margin-left: 16px; }
  .vline-title { font-size: clamp(5rem, 28vw, 9rem); }
  .juan { padding: 34px 22px 40px; }
  .juan-head h2 { gap: 12px; }
  .colophon { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 460px) {
  .frontispiece .leaf-inner { grid-template-columns: 1fr; grid-template-areas: "face"; padding: 40px 20px; }
  .frontispiece .banye {
    display: none;
  }
  .face-left { padding-right: 0; justify-content: center; }
  .vline { margin-left: 10px; }
}

/* ---------- 13. 无障碍：减动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .vline .ch { opacity: 1; }
}